Note 17 - Segmented Information - Operating Results by Geographic Segments (Details) - USD ($)	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Mineral Property Expenditures	$ 4,478,807	$ 4,582,403
General and administrative	12,639,998	9,441,898
Depreciation, amortization and accretion	393,173	310,222
Loss from operations	(17,511,978)	(14,334,523)
Other income (expenses)	2,694,160	(281,544)
Loss before income taxes	(14,817,818)	(14,616,067)
United States Texas [Member]
Mineral Property Expenditures	3,002,300	3,165,898
General and administrative	9,596,400	6,982,684
Depreciation, amortization and accretion	357,600	273,687
Loss from operations	(12,956,300)	(10,422,269)
Other income (expenses)	(2,541,515)	(3,417,783)
Loss before income taxes	(15,497,815)	(13,840,052)
United States Arizona [Member]
Mineral Property Expenditures	125,241	104,191
General and administrative	15,317	13,717
Depreciation, amortization and accretion
Loss from operations	(140,558)	(117,908)
Other income (expenses)	(18,914)	(18,965)
Loss before income taxes	(159,472)	(136,873)
United States Wyoming [Member]
Mineral Property Expenditures	672,225	596,551
General and administrative	86,211	112,193
Depreciation, amortization and accretion	14,876	14,876
Loss from operations	(773,312)	(723,620)
Other income (expenses)	(9,982)	2,095
Loss before income taxes	(783,294)	(721,525)
United States Other States [Member]
Mineral Property Expenditures	69,075	69,523
General and administrative	1,830	2,277
Depreciation, amortization and accretion		850
Loss from operations	(70,905)	(72,650)
Other income (expenses)
Loss before income taxes	(70,905)	(72,650)
CANADA
Mineral Property Expenditures	7,752
General and administrative	2,894,424	2,272,138
Depreciation, amortization and accretion	16,870	11,959
Loss from operations	(2,919,046)	(2,284,097)
Other income (expenses)	5,259,464	3,147,724
Loss before income taxes	2,340,418	863,627
PARAGUAY
Mineral Property Expenditures	602,214	646,240
General and administrative	45,816	58,889
Depreciation, amortization and accretion	3,827	8,850
Loss from operations	(651,857)	(713,979)
Other income (expenses)	5,107	5,385
Loss before income taxes	$ (646,750)	$ (708,594)